Meghan Markle, 37, and Prince Harry, 34, are embarking on their first overseas tour which will involve a 16-day trip to Australia, Fiji, Tonga and New Zealand.

It will coincide with the fourth Invictus Games – organised by Harry for injured servicemen and women – in Sydney in October.

But despite capturing hearts in most parts of the globe, Meghan and Harry"s romance appears to have failed to rub off on some in Fiji.

The couple, who wed in May, have landed in Fiji just 20 days before the country's November 14 election.

Robin Nair, who was Fiji's foreign affairs permanent secretary until he quit last year, said "the perception is, of course, that the [Fijian] Government will take full advantage" of the opportunity to be seen with the pair.

The November election will be only the second democratically-held election since a 2006 coup led by Prime Minister Frank Bainimarama ousted the then-prime minister and started eight years of military-led rule.

"I would have thought the British High Commission in Suva would have advised the Commonwealth office in London about the forthcoming elections and the environment in which the elections are taking place," Mr Nair told the ABC.

"The palace should be advised that the visit should be postponed. It's not the right timing."

Another outspoken Government critic, Shailendra G Raju, who has been an aide to two former Fijian prime ministers, posted a letter addressed to the UK High Commissioner to Fiji on Facebook calling for the visit to be "postponed to a mutually convenient and more appropriate time".

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EXCITED: The royal couple will visit Fiji as part of their Commonwealth tour (Pic: PA) (Image: PA)

WHIRLWIND: Meghan and Harry have been busy since they married in May (Pic: PA) (Image: PA)

However, in a statement provided to the ABC, a spokesperson for the High Commission maintained that the "program will be non-political and support bilateral relations between the two countries".

"Given that Their Royal Highnesses are visiting Australia, New Zealand, and Tonga next month, it makes sense for a visit to Fiji to take place at the same time," the statement said.

Associate Professor Giselle Bastin, a royal expert at Flinders University, said since the early 20th century it had become important for the Royal family to remain politically neutral, and "they are seen to maintain their political impartiality".

She said the itinerary for the October trip would have been finalised long before the election was called in Fiji, so it wouldn't be fundamentally changed, "but it will be built into their itinerary that they are at least exposed to people from the various political persuasions".